-16-
8.5- Transfer of the slotted templet points onto the bases
The permatrace bands containing the slotted templet con'
trol at 1/10 .000, already used in the rectification process, were
then orientated on the grid and the slotted templet control pricked
on the mosaic bases.
As the tie points of adjacent strips appear on 2 bands,
the minimization of the contradictions was taken into consideration
for the final adjustment.
The permatrace instability has caused longitudinal de
formations that for common points of adjacent strips, 8 to 10 me
ters apart, reached 1 cm. occasionally.
The use of more stable transparent materials would be
strongly advisable. However, only reduced size sheets were avai
lable on the local market.
The contradictions found could be neutralized to a
great extent resorting to the auxiliary data - control and U.T.M.
grids .and control joints - and orientating-the bands por sections.
The remaining errors in the tie pointswere further mi
nimized by pricking the average positions. They were of the order
of 1 - 2 mm.
In this way all the radial triangulation control was
transferred on to the unitex bases.
9,- MOUNTING
This stage of the work having been processed in the
usual way, does not deserve any special reference - Figure №. 5.
Although the prints had been enlarged twice in the rec
tification, only a small number had to be repeated for tone mat
ching, owing to the good quality of the optics of the aerial camera
and rectifier and the skill and experience of the lab personnel.
After gluing the rectified photographs on the bases,
the U.T.M, coordinate grid was drawn and the coordinates inserted on
the edge mosaics. The prints were then cut along the mosaic junc
tions, Finally all the mosaics were numbered on the back, as shown
on figure n Q . 3,
Photo annotation was not included as the M.F.P.Z. had
it available through the 1/50,000 map series. Otherwise the de
livery time would have been somewhat delayed.
10,- LAB REPRODUCTION
The mosaics thus obtained were not at all easy to han
dle in field work nor did they contain any marginal data for quick